Home / 5,128.22-7,076.94-2,890.64

Finding the Fourth Proportional to 5,128.22, 7,076.94 and 2,890.64

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Solution

The fourth proportional to 5,128.22, 7,076.94 and 2,890.64 is: 3,989.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,128.22 : 7,076.94 = 2,890.64 : x
  2. Step 2: Convert to fraction form
    5,128.22/7,076.94 = 2,890.64/x
  3. Step 3: Cross multiply
    5,128.22x = 7,076.94 × 2,890.64
  4. Step 4: Simplify right side
    5,128.22x = 20,456,885.84
  5. Step 5: Solve for x
    x = 20,456,885.84/5,128.22
  6. Step 6: Final answer
    x = 3,989.08

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.